is welding and what do welders do?
is the most economical and efficient way to join metals permanently. It is the
only way of joining two or more pieces of metal to make them act as a single piece.
Welding is vital to our economy. It is often said that over 50% of the gross national
product of the U.S.A. is related to welding in one way or another. Welding ranks
high among industrial processes and involves more sciences and variables than
those involved in any other industrial process.
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are many ways to make a weld and many different kinds of welds. Some processes
cause sparks and others do not even require extra heat. Welding can be done anywhere
outdoors or indoors, underwater and in outer space.
everything we use in our daily life is welded or made by equipment that is welded.
Welders help build metal products from coffeepots to skyscrapers. They help build
space vehicles and millions of other products ranging from oil drilling rigs to
automobiles. In construction, welders are virtually rebuilding the world, extending
subways, building bridges, and helping to improve the environment by building
pollution control devices. The use of welding is practically unlimited. There
is no lack of variety of the type of work that is done.
are employed in many industry groups. Machinery manufacturers are responsible
for agricultural, construction, and mining machinery. They are also involved in
bulldozers, cranes, material handling equipment, food-processing machinery, papermaking
and printing equipment, textiles, and office machinery.
fabricated metals products compiles another group including manufacturers of pressure
vessels, heat exchangers, tanks, sheet metal, prefabricated metal buildings and
architectural and ornamental work. Transportation is divided into two major groups:
manufacturers of transportation equipment except motor vehicles; and motor vehicles
and equipment. The first includes shipbuilding, aircraft, spacecraft, and railroads.
The second includes automobiles, trucks, buses, trailers, and associated equipment.
small group of welders belongs to the group of repair services. This includes
maintenance and repair on automobiles or refers to the welding performed on industrial
and electrical machinery to repair worn parts.
The mining, oil extraction, and gas extraction industries form yet another group.
A large portion of the work involves drilling and extracting oil and gas or mining
of ores, stone, sand and gravel.
are also employed in the primary metals industries to include steel mills, iron
and steel foundries, smelting and refining plants. Much of this work is maintenance
and repair of facilities and equipment. Another group is the electrical and electronic
equipment companies. Welding done by this group runs from work on electric generators,
battery chargers, to household appliances.
administration employs welders to perform maintenance welding that is done on
utilities, bridges, government armories and bases, etc. Yet another group involves
wholesale and retail establishments. These would include auto and agricultural
equipment dealerships, metal service centers, and scrap yards.
the smallest group of welders, but perhaps those with the biggest impact on the
public are the artist and sculptors. The St. Louis Arch is possibly one of the
best known. But there are many other fountains and sculptures in cities and neighborhoods
around the world.
article was excerpted from Modern Welding Technology, 4th edition, 1998, by Howard
B. Cary. Published by Prentice-Hall, the book may be ordered from the Training
Materials Dept., Hobart Institute of Welding Technology, 400 Trade Square East,
Troy, OH 45373. http://www.welding.org
provided by Hobart Institute Of Welding Technology
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